Improvement in fire-engines



D. M. COOPER.

Fire-Engine.

No 207,165 Patented Aug. 20,1878.

PETEm PHOTOJ ITNDGRAFHER. WASNINGTON. D c.

UNITED STATES PATENT QFFICE.

DANIEL M. COOPER, OF DUBLIN, INDIANA.

IMPROVEMENT IN FIRE-ENGINES.

Specification forming part of Letters Patent No. 207,165, dated August20, 1878; application filed February 27, 1878.

To all whom it may concern:

Be it known that I, DANIEL M. COOPER, of Dublin, in the county of Wayneand State of Indiana, have invented new and useful Improvements inFire-Engines, of which the following is a specification:

This invention relates to that class of forcepumps that may be used forextinguishing fires, watering gardens, and other analogous purposes.

In the annexed drawings, making a part of this specification, Figure lis a side elevation. Fig. 2 is a longitudinal vertical section. Fig. 3is a plan view of the water-chamber.

The same letters are employed in all the figures in the indication ofidentical parts.

A is a frame,upon which the cylinders are supported,whichmaybe mountedupon wheels for convenience in transportation.

E is the water-induction pipe, through which the water is lifted tosupply two pump-cylinders, O C, which are connected by a branch pipewith the inductionpipe, and which open above into a water-chamber, D,common to both.

E is the lever by which the pumps are operated, after the manner commonin such engines, being centrally pivoted upon the standard E, andfurnished with handles at each end.

In each cylinder 0 is a valve, F, composed, substantially, of a brasstube, with leatheror india-rubber packing, and an interior valvecomposed of a half-ball of india-rubber, and fitted with a stem, whichmoves freely up and down in guides formed on the interior of the tubefor the purpose.

Other of the well-known forms of plungers in common use may be adopted,if preferred.

G G are the pump-rods, extending from the valves F through the reversedbuckets H H, and pivoted to communicating rods I I, which are in turnpivoted to the lever E on each side of the fulcrum. The reversed bucketsH H work in cylinders D formed on the under side of the cap D of thewater-chamber D. The reversed buckets H are fitted. to the interior ofthe cylinders D by leather or rubber packing, so as to prevent theescape of the water. water is intended to pass out through them; butthey serve to apply pressure to the water in the water-chamber as theyare alternately forced down by the lever, and so assist in forcing thewater from the water-chamber. The water is ejected from thewater-chamber D through pipes K K into the hose L.

As a substitute for the ordinary metallic airchamber employed in suchengines for giving continuity of the flow of the water through thenozzle of the hose, I employ an elastic bulb, M, which is connected withthe hose, so that the water shall flow through it, and is made ofelastic india-rubber, and with a strength proportioned to the forceintended to be applied in the ejection of the stream of water.

When an excess of pressure is applied, the bulb M will be expanded,yielding to such pressure. When the pressure is diminished, thecontraction of the elastic bulb will drive out the water containedwithin it, and thus maintain within the limits of its capacity a uniformdelivery of the stream, with a varying pressure.

I am aware that force-pumps with a similar arrangement of plungers andvalves have been long known; but my invention is distinguished from themin this, that instead of having a single long chamber to receive boththe plungers on the same rod, I make the upper cylinder, D independentof the cylinder 0, the former being cast in one piece with or bolted tothe cap, whereby I greatly simplify and cheapen the construction.

What I claim as my invention, and desire to secure by Letters Patent, is

In combination with a force-pump and its delivery-pipe, an elastic bulb,M, in the deliverypipe, the expansion and contraction of which aredesigned to maintain a uniformity of outflow, substantially as setforth.

In testimony whereof I have hereunto signed my name.

D. M. COOPER. Witnesses:

LEwis ORIPE, J osnrn HINKLE.

They are not fitted with valves, as no

